Music can be very important in games. Although i've got to admit i usually play with the sound of. But that's because of terrible voice acting and bad music. When playing games like Final Fantasy it's worth listening to the music and dialogs. So it does matter.
@tachsniper I agree on Kefka being a great villain and more accomplishments. But I think Sephiroth has a better story around him. If you'd really know the story then you'd know he's not mad at his parents, but at the people that destroyed them. He thinks that Jenova was a Cetra, which according to the books he read, got destroyed by the humans. (Jenova actually was the one who destroyed the Cetra, but he couldn't have known) So he wants to destroy humanity and relieve the earth of it's polution and stuff like that. Using the earth as his ''ship'', he wants to travel to a new planet to start a new and good society. So there's actually more behind it than you just described, and the story around the villain makes the villain I think. That's why I will always find Sephiroth the greatest villain ever.
DGonlag's comments